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1. A fractured bone is fixed with a paste made of Plaster of Paris (POP). It is a powdery substance which is used as a coating over the bandage on the fractured bone. After a few hours, the POP becomes hard and dry.
This change occurred in POP is a
This change occurred in POP is a
2. Sara got a pleasant smell of incense stick when she entered her home. She observed that, the paper kept below the incense stick got burnt in some places. On seeing this, she immediately kept the burning incense stick on a metal plate.
What type of change happened during the burning of incense stick?
What type of change happened during the burning of incense stick?
3. The phase change between solid to liquid on heating is known as
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